2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
11 * Linux implementation.
15 #ifndef OSI_MACHDEP_H_
16 #define OSI_MACHDEP_H_
18 /* Only needed for xdr.h in glibc 2.1.x */
20 #define quad_t __quad_t
21 #define u_quad_t __u_quad_t
26 #define getpid() current->pid
27 #ifdef STRUCT_TASK_STRUCT_HAS_REAL_PARENT
28 #define getppid() current->real_parent->pid
30 #define getppid() current->p_opptr->pid
33 #ifdef RECALC_SIGPENDING_TAKES_VOID
34 /* Principal of maximum uselessness says we need to provide this */
35 static inline int _has_pending_signals(sigset_t *signal, sigset_t *blocked)
40 switch (_NSIG_WORDS) {
42 for (i = _NSIG_WORDS, ready = 0; --i >= 0 ;)
43 ready |= signal->sig[i] &~ blocked->sig[i];
46 case 4: ready = signal->sig[3] &~ blocked->sig[3];
47 ready |= signal->sig[2] &~ blocked->sig[2];
48 ready |= signal->sig[1] &~ blocked->sig[1];
49 ready |= signal->sig[0] &~ blocked->sig[0];
52 case 2: ready = signal->sig[1] &~ blocked->sig[1];
53 ready |= signal->sig[0] &~ blocked->sig[0];
56 case 1: ready = signal->sig[0] &~ blocked->sig[0];
61 #define PENDING(p,b) _has_pending_signals(&(p)->signal, (b))
62 static inline void _recalc_sigpending_tsk(struct task_struct *t)
64 t->sigpending = PENDING(&t->pending, &t->blocked) ||
65 #ifdef STRUCT_TASK_STRUCT_HAS_SIG
66 PENDING(&t->sig->shared_pending, &t->blocked);
68 PENDING(&t->signal->shared_pending, &t->blocked);
72 #define RECALC_SIGPENDING(X) _recalc_sigpending_tsk(X)
74 #define RECALC_SIGPENDING(X) recalc_sigpending(X)
77 #if defined (STRUCT_TASK_STRUCT_HAS_SIGMASK_LOCK)
78 #define SIG_LOCK(X) spin_lock_irq(&X->sigmask_lock)
79 #define SIG_UNLOCK(X) spin_unlock_irq(&X->sigmask_lock)
80 #elif defined (STRUCT_TASK_STRUCT_HAS_SIGHAND)
81 #define SIG_LOCK(X) spin_lock_irq(&X->sighand->siglock)
82 #define SIG_UNLOCK(X) spin_unlock_irq(&X->sighand->siglock)
84 #define SIG_LOCK(X) spin_lock_irq(&X->sig->siglock)
85 #define SIG_UNLOCK(X) spin_unlock_irq(&X->sig->siglock)
91 #define osi_Time() (xtime.tv_sec)
93 #define osi_GetTime(V) do { (*(V)).tv_sec = xtime.tv_sec; (*(V)).tv_usec = xtime.tv_usec; } while (0)
95 #define osi_GetTime(V) (*(V)=xtime)
99 #define gop_lookupname osi_lookupname
101 #define osi_vnhold(v, n) VN_HOLD(v)
103 #define osi_AllocSmall afs_osi_Alloc
104 #define osi_FreeSmall afs_osi_Free
106 #define afs_suser suser
107 #define wakeup afs_osi_Wakeup
110 #define vType(V) ((( vnode_t *)V)->v_type & S_IFMT)
112 /* IsAfsVnode relies on the fast that there is only one vnodeop table for AFS.
113 * Use the same type of test as other OS's for compatibility.
116 extern struct vnodeops afs_dir_iops, afs_symlink_iops;
117 #define IsAfsVnode(vc) (((vc)->v_op == afs_ops) ? 1 : \
118 ((vc)->v_op == &afs_dir_iops) ? 1 : \
119 ((vc)->v_op == &afs_symlink_iops))
122 /* bcopy is in stds.h, just so fcrypt.c can pick it up. */
123 #define bzero(D,C) memset((D), 0, (C))
124 #define bcmp(A,B,C) memcmp((A), (B), (C))
127 /* We often need to pretend we're in user space to get memory transfers
128 * right for the kernel calls we use.
130 #ifdef KERNEL_SPACE_DECL
131 #undef KERNEL_SPACE_DECL
133 #undef TO_KERNEL_SPACE
135 #define KERNEL_SPACE_DECL mm_segment_t _fs_space_decl
136 #define TO_USER_SPACE() { _fs_space_decl = get_fs(); set_fs(get_ds()); }
137 #define TO_KERNEL_SPACE() set_fs(_fs_space_decl)
139 /* Backwards compatibilty macros - copyin/copyout are redone because macro
140 * inside parentheses is not evalutated.
142 #define memcpy_fromfs copy_from_user
143 #define memcpy_tofs copy_to_user
144 #define copyin(F, T, C) (copy_from_user ((char*)(T), (char*)(F), (C)), 0)
145 #define copyinstr(F, T, C, L) (copyin(F, T, C), *(L)=strlen(T), 0)
146 #define copyout(F, T, C) (copy_to_user ((char*)(T), (char*)(F), (C)), 0)
148 /* kernel print statements */
149 #define printf printk
150 #define uprintf printk
153 #define PAGESIZE PAGE_SIZE
156 typedef struct cred { /* maps to task field: */
162 uid_t cr_uid; /* euid */
163 uid_t cr_ruid; /* uid */
164 gid_t cr_gid; /* egid */
165 gid_t cr_rgid; /* gid */
166 gid_t cr_groups[NGROUPS]; /* 32 groups - empty set to NOGROUP */
169 #define AFS_UCRED cred
170 #define AFS_PROC struct task_struct
171 #define crhold(c) (c)->cr_ref++
173 /* UIO manipulation */
174 typedef enum { AFS_UIOSYS, AFS_UIOUSER } uio_seg_t;
175 typedef enum { UIO_READ, UIO_WRITE } uio_flag_t;
177 struct iovec *uio_iov;
179 afs_offs_t uio_offset;
184 #define afsio_iov uio_iov
185 #define afsio_iovcnt uio_iovcnt
186 #define afsio_offset uio_offset
187 #define afsio_seg uio_segflg
188 #define afsio_fmode uio_fmode
189 #define afsio_resid uio_resid
191 /* Get/set the inode in the osifile struct. */
192 #define FILE_INODE(F) (F)->f_dentry->d_inode
195 /* page offset is obtained and stored here during module initialization
196 * We need a variable to do this because, the PAGE_OFFSET macro defined in
197 * include/asm/page.h can change from kernel to kernel and we cannot use
198 * the hardcoded version.
200 extern unsigned long afs_linux_page_offset;
202 /* some more functions to help with the page offset stuff */
203 #define AFS_LINUX_MAP_NR(addr) ((((unsigned long)addr) - afs_linux_page_offset) >> PAGE_SHIFT)
205 #define afs_linux_page_address(page) (afs_linux_page_offset + PAGE_SIZE * (page - mem_map))
207 #if defined(__KERNEL__) && defined(CONFIG_SMP)
208 #include "../h/sched.h"
209 #include "linux/wait.h"
211 extern struct semaphore afs_global_lock;
212 extern int afs_global_owner;
214 #define AFS_GLOCK() \
216 down(&afs_global_lock); \
217 if (afs_global_owner) \
218 osi_Panic("afs_global_lock already held by pid %d", \
220 afs_global_owner = current->pid; \
223 #define ISAFS_GLOCK() (afs_global_owner == current->pid)
225 #define AFS_GUNLOCK() \
227 if (!ISAFS_GLOCK()) \
228 osi_Panic("afs global lock not held at %s:%d", __FILE__, __LINE__); \
229 afs_global_owner = 0; \
230 up(&afs_global_lock); \
236 #define AFS_GUNLOCK()
237 #define ISAFS_GLOCK() 1
238 #define AFS_ASSERT_GLOCK()
239 #define AFS_ASSERT_RXGLOCK()
242 #define AFS_RXGLOCK()
243 #define AFS_RXGUNLOCK()
244 #define ISAFS_RXGLOCK() 1
245 #endif /* OSI_MACHDEP_H_ */